Coriolis Mass Flowmeter for LNG Storage and Transport
Product Introduction
Coriolis force, is a description of the deflection of the linear motion of a particle in a rotating system due to inertia relative to the linear motion of the rotating system.
In a rotating system, a particle that moves in a straight line has a tendency to continue moving along the original direction of motion due to inertia. However, since the system itself rotates, after a period of movement, the position of the particle in the system will change. Changes, and its original movement direction and position will change. The force that causes the change in its movement direction is the Coriolis force.
Coriolis mass flow meter is a direct mass flow meter that uses the principle of Coriolis force that is proportional to the mass flow rate of the fluid when the fluid is in another rotating system while moving linearly. This Coriolis force will cause the vibrating measuring tube to twist, as shown below:
The Coriolis mass flowmeter has a signal detector at the inlet and outlet ends of the measuring tube. The motion state of the inlet and outlet ends of the vibrating tube twisted by the Coriolis force is out of sync, and a time difference will be detected by the detector, as follows Figure, this time difference is proportional to the mass flow rate.
Product Features
It passed ATEX, CCS, IECEx and PESO certificates.
1. Using hardware DSP data processing technology
Our company adopts the world's most advanced second-generation transmitter technology - DSP processing technology, which has higher measurement accuracy, wider range, simpler structure and more stable operation.
2. Can measure high pressure gas
The application of domestic mass flow meters is mainly concentrated in the field of liquid measurement, and there is no mature application in the field of gas measurement. On the basis of mastering DSP processing technology, our company complies with the needs of the industry and designs a high-precision mass flow meter suitable for high-pressure gas measurement, which is more suitable for the needs of the high-pressure gas measurement industry and has better performance.
3. Industry-leading high-pressure aging process
The high-pressure aging platform built by our company conducts aging tests on each CNG flow meter, providing an effective solution to the problem of measurement performance degradation that may be caused by changes in sensor characteristics due to long-term high pressure during later use.
4. Good zero point stability
Our company has designed a set of high-precision processing technology for the manufacturing of sensors to ensure the quality of the sensor, and its zero-point stability is not inferior to imported products.
5. Multi-parameter measurement technology
Our company adopts digital signal processing (DSP) technology. Compared with analog technology, front-end digital processing equipment significantly reduces signal noise and responds faster. It adopts 485 communication. The host side of the metering system can obtain the required relevant parameters through 485 communication. , such as: mass flow, volume flow, temperature, density, status and other information. For liquid applications, mass flow meters using multi-parameter measurement technology can achieve an accuracy of 0.2. The actual accuracy can be higher and the performance can be even better.
6. Self-diagnosis technology
In the actual application process, when an abnormality occurs in the flow meter, the fault code can be read through debugging software or handheld debugging equipment, which facilitates flow meter users to solve the problem more comprehensively and eliminate faults.
7. Supports standard industrial control communication protocols ModbusRTU, etc., making it easy to configure and use.
8. Industry-leading cryogenic calibration platform
In the process of LNG development, the company has built an industry-leading cryogenic calibration platform, using liquid nitrogen (-196°C) with a lower temperature than LNG as the calibration medium, providing a cryogenic solution for the development of LNG Coriolis flowmeters. Application experience. This calibration platform has now been used as the calibration platform for all the company's LNG flow meters, enabling real cryogenic calibration of each LNG flow meter to ensure the measurement accuracy of cryogenic applications.
9. Good scalability
The company can design and manufacture mass flow meters with special specifications and models and special functions according to user needs, tailor-made for users.
Specifications
| Accuracy |
0.1% (Optional), 0.15%, 0.2%, 0.5% (Default) |
| Repeatability |
0.05% (Optional), 0.075%, 0.1%, 025%(Default) |
| Density |
±0.001g/cm3 |
| Temp. |
±1°C |
| Answer the liquid material |
304 , 316L, ( Customizable: Monel 400, Hastelloy C22 , etc.) |
| Measuring medium |
Gas, Liquid and Multi-phase flow |
Technical Parameters
| Model |
AMF050A |
AMF080A |
| Nominal diameter |
DN50 |
DN80 |
| Measuring medium |
Liquid,Gas |
| Medium temp.range |
- 196ºC~+70ºC |
| Max.Flow-rate |
50 t/h |
108 t/h |
Working Pressure range
(Customizanle) |
≤4MPa |
Connection Mode
(Customizanle) |
HG/T 20592, DN50
PN40 RF (A) ,WN |
HG/T 20592, DN80
PN40 RF (A) ,WN |
| Liquid Trough Materrial |
316L |
| Safety and Protection |
IP67
CNEX:Ex d ib IB T5 Gb |
Product Advantages
a. The optimal vibration mode of flowmeters is determined after the finitement analysis, the structure is improved and the modal in each order is reasonably distributed. Driven by the simple harmonic, each position of the measuring tube will respond. A reasonable damped structure has been designed to improve the noise-proof feature.
b. The high-performance 32/40-bit DSPs are used as the core processor, including high efficiency instruction set, hardware FFT and other peripherals specially used for audio signal processing to fast process various digital signals in real time and largely improve the stability of flowmeters
c. The mass flowmeter is welded by the unique vacuum brass solder process, which ensures the welding quality and also fully guarantees the stress removal to largely improve the zero stability of mass flowmeter in use.
d. Water gauge calibration testing platform: The Company owns the scarce calibration systems and stability testing system for water gauges with large-span diameter (DN6-DN400) in the industry for the operating condition calibration and the stability testing of flowmeters.
e. High pressure gas testing platform: The Company has established the first high pressure air (25MPa) calibration system and stability testing system in China for the operating condition calibration and the stability testing of high-pressure flowmeters.
f. Liquid nitrogen low-temperature calibration testing platform: The Company has established the first copious cooling calibration system and stability testing system in China for the operating condition calibration and the stability testing of low-temperature flowmeters.
About ANDISOON
Chengdu Andisoon Measure Co., Ltd is a leading instrument-making manufacturer in China, renowned for its patents, copyrights, and industry-standard certifications. With over 110 patents, Andisoon has independently developed high-quality flowmeters and a wide range of precision measurement products, including flowmeters , Nozzles & Valves, Cryogenic Pumps, Liquid Hydrogen products, Calibration Devices, Automatic Meters, and System Integration.
Andisoon's flowmeters are utilized across various industries, including oil, refining, chemical, shipbuilding, pharmaceuticals, food & beverage, and environmental protection. They excel in challenging environments, such as high pressure, viscosity, and temperature variations, with sensors designed to withstand high pressures, enabling greater sensitivity in signal detection.
The company offers high-precision metering solutions, with product sizes ranging from DN3 to DN150, and provides ODM, OEM, and direct sales services for overseas customers. Andisoon possesses rare calibration systems and stability testing for water gauges, including large-span diameter (DN6-DN400) and high-pressure air (25MPa) calibration and stability testing systems, as well as extensive cooling calibration systems for low-temperature flowmeters.
Why ANDISOON
Through many tests and improvements, ANDISOON summed up our experience and finally determined an inlet and outlet combined splitter cone, vacuum nickel-based brazing and heat treatment technology suitable for the CNG flowmeter produced by our company.
1. Imported combined splitter cone (obtained utility model patent - patent number: 201020170649.5)
The inlet end and the outlet end are structurally symmetrical and are connected by a pipe body. The inlet end and the outlet end are composed of an interface joint, a shunt cone, two measuring tubes and a measuring tube joint, wherein the interface joint and the measuring tube joint form a The two are docked and positioned with a shunt cone. The measuring tube is inserted into the measuring pipe joint and then welded. The shunt cone is inserted into the measuring tube and the measuring pipe joint. The measuring tube and the shunt cone maintain a tight positioning fit.
The measuring tube and the measuring tube joint are welded by argon arc welding; the diverter cone is inserted into the inner hole of the measuring tube joint in the axial and radial directions, and the diverter cone is positioned in conjunction with the measuring tube in the circumferential direction.
The interface joint is placed on the diverter cone, so that the outer cone surface of the diverter cone and the inner cone surface of the interface joint are positioned axially, and the inner hole of the interface joint is positioned radially. The interface joint and the diverter cone are also integrally pressed. Tight and welded with argon arc welding.
Beneficial effects:
When used in CNG flowmeters, this utility model can effectively improve the yield of CNG flowmeters, reduce the overall production cost, and scientifically ensure the overall performance of the CNG flowmeter. Moreover, this method and structure also have the characteristics of easy parts processing, low cost, and easy assembly and welding. The application of this method and structure will be of great help to the development of low-priced, high-performance domestic CNG flow meters, and will lay a solid foundation for the market dominance of domestic CNG flow meters.
2. Vacuum nickel-based brazing and heat treatment (obtained invention patent - patent number: 201010186127.9)
This process is completed according to the process flow of parts positioning, parts calibration, surface treatment, solder laying, vacuum welding and vacuum insulation, and cooling out of the furnace. It effectively solves the problem of CNG flowmeter failure caused by uneven heating of the measuring tube due to conventional silver-based manual soldering. Performance is greatly reduced.
After this process is applied in the production process of CNG flow meters, the deformation of the measuring tube and the uneven internal stress are minimized, which greatly improves the performance of the CNG flow meter. The yield can reach 95% and the overall cost is reduced. It is suitable for CNG flow. Large-scale mass production of CNG flow meters; it can bring the overall technology and accuracy of CNG flow meters to a new level; it will be of great help to the development of low-priced, high-performance domestic CNG flow meters and create a better market for domestic CNG flow meters. Dominance has laid a solid foundation.
3. High-precision time difference detection technology
It is used for high-precision time difference testing of mass flow meters. The time difference measurement can reach within 0.3 nanoseconds, ensuring high accuracy of measurement; it adopts DSP (digital signal processing) technology and can effectively replace imported products.
1) Adaptive linear digital filtering technology
It can filter out the interference waveform of the output current of the mass flow meter sensor. Linear filtering does not affect the linear characteristics of the flow meter. In addition, because the transmitter needs to adapt to sensors with multiple natural frequencies, an adaptive algorithm is designed to achieve frequency adaptation. Ensure the versatility of the filtering algorithm.
2) Weak signal detection circuit based on high-precision differential analog operational amplifier
It belongs to the circuit design of the mass flow meter. The design of the voltage follower prevents the output from affecting the input. The design of the differential circuit effectively suppresses common mode interference signals. It has strong anti-interference performance, low detection signal amplitude and high accuracy.
3) Adaptive broadband oscillation technology based on frequency sweep algorithm
Used for mass flow meters, it has a wide frequency sweep range and fast frequency sweep speed, effectively ensuring the detection of the center frequency. Different sensors can be set to different frequency sweep ranges.
4) Synchronous phase tracking technology for constant measurement of tube resonance amplitude
It is used in mass flow meters to ensure that the resonance amplitude of the measuring tube is stable, the fluctuation is small, and the phase synchronization can be achieved within 6°.
UNIQUE FEATURES OF ANDISOON MASS FLOWMETER
Mass flow meters are known for their high accuracy, wide measuring range and reliable performance, and have been successfully used in various industries over the past many years.
Unlike other instruments that are limited to measuring liquids at normal pressure and temperature, ANDISOON excels in measuring under challenging conditions, including high pressure, high viscosity, and high and low temperatures. For example, when measuring CNG (compressed natural gas), the difficulty lies in the high pressure. However, ANDISOON's sensors can withstand high pressures, allowing the necessary increase in flow tube thickness, allowing the transmitter to detect signals with greater sensitivity. Therefore, ANDISOON's mass flow meters specially designed for CNG gas dispensers have been widely used in the domestic market
In the high-pressure sector, Andisoon has developed mass flowmeters for CNG gas charging, mass flowmeters for gas unloading columns, and mass hydrometers for hydrogenation machines with a maximum working pressure of 100MPa.
In the field of cryogenics, Andisoon has developed a backflow meter and a liquid phase injection meter for LNG refueling stations, with a minimum temperature of -196°C.
In the field of process control, Andison has developed a micro-bend type mass flowmeter, with a maximum flow rate of up to 300t/h, widely used in petroleum, chemical and other industrial conditions.
In the field of high-flow low-temperature metering, Andisoon has developed a U-shaped high-vacuum mass flowmeter, which has been patented and is used in liquefaction plants and ship loading and unloading operations.
Andison is committed to providing high-precision metering solutions, with product sizes ranging from DN3 to DN150, meeting your personalized metering needs.
FAQ
1. Customer: What is the delivery date?
Andisoon: Our stock is based on GB/DIN flange, with a delivery date of 10 days. We also accommodate other flanges like ANSI/JIS or thread connection, with a delivery date of 15 days.
2. Customer: Can you design according to my requirements?
Andisoon: Yes, we offer OEM service and can tailor products to your specifications.
3. Customer: What is the warranty period?
Andisoon: The quality guarantee period is 12 months from the completion of installation and commissioning by the purchaser, or 14 months from the date of delivery (whichever comes first), excluding maintenance kits or small accessories.
They choose ANDISOON
The product has obtained type approval from China Classification Society, ATEX certification, IECEx certification, India PESO certification, and SIL functional safety certification and exported to many overseas countries.
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